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Add validation check to ensure valid image domain of [0.0, 1.0] #8

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Add validation check to ensure valid image domain of [0.0, 1.0] #8

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2171bfc
Add check for min and max values
davidslater May 28, 2021
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davidslater May 28, 2021
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8 changes: 8 additions & 0 deletions common/framework.py
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Original file line number Diff line number Diff line change
Expand Up @@ -227,6 +227,14 @@ def evaluate(self, defense, example_idx, true_label,
if distortion > self.threshold + 1e-3:
return False, "Distortion {} exceeds bound {}".format(distortion, self.threshold)

# Verify that example is within [0, 1] domain of input images
min_val = np.min(adv_example)
max_val = np.max(adv_example)
if min_val < 0.0:
return False, "Adversarial example min value {} is outside of [0, 1] range".format(min_val)
if max_val > 1.0:
return False, "Adversarial example max value {} is outside of [0, 1] range".format(max_val)

# Verify that it's not detected as adversarial
if adv_detector > defense.threshold:
return False, "Adversarial example rejected by detector with score {}.".format(adv_detector)
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